MBS HARQ Process Configuration for Reliable Handover Data
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Solution Overview
Problem
Efficient support for broadcast services in 5G communication systems, particularly multicast and broadcast services (MBS), is required to meet the diverse requirements of enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low-latency communication (URLLC) in IoT environments.
Innovation Solution
A method for user equipment (UE) in a wireless communication system that involves receiving multicast broadcast service (MBS) configuration information including hybrid automatic repeat request (HARQ) processes, processing MBS data based on these processes, and applying HARQ to MBS data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ is applied to MBS data transmission, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments MBS data transmission into multiple HARQ processes, where each process handles specific data packets independently. This segmentation allows the system to maintain high reliability through multiple retransmission opportunities while managing complexity by dividing the overall transmission task into smaller, manageable units that can be processed separately.
Solution Approach 2:
The patent implements preliminary configuration of HARQ parameters and processes before MBS data transmission begins. By pre-configuring HARQ process IDs, timing relationships, and resource allocations, the system reduces real-time processing complexity at the UE while maintaining reliable transmission through established retransmission mechanisms.
2Reliability
If multiple HARQ processes are configured for MBS, then data loss during handover is reduced, but power consumption increases
Solution Approach 1:
The patent employs periodic HARQ processes where multiple processes are configured to operate in cycles. During handover events, these periodic processes ensure data continuity by having备用 (backup) processes ready to take over. The periodic nature allows the UE to manage power consumption by entering low-power states between active HARQ transmission periods while maintaining reliability through the pre-configured multiple processes.
3Productivity
If HARQ timing is optimized for MBS, then transmission efficiency is improved, but adaptability to different scenarios decreases
Solution Approach 1:
The patent implements dynamic HARQ timing adjustment where the timing parameters can be adapted based on the specific MBS scenario. The system maintains optimized timing for efficient transmission while incorporating dynamic adjustment mechanisms that allow flexibility across different scenarios such as varying channel conditions, handover situations, and service requirements. This dynamic approach resolves the contradiction by making the timing both optimized and adaptable.
Data Source
AI summary
According to an embodiment of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system includes receiving, from a base station (BS), multicast broadcast service (MBS) configuration information including information about at least one hybrid automatic repeat request (HARQ) process for an MBS, receiving, from the BS, MBS data based on the MBS configuration information, and processing the MBS data based on an HARQ process corresponding to the MBS data among the at least one HARQ process for the MBS.